Supercharged is SSM Class

[tpearsall]

I'm fairly new to autocrossing and hoping get a bit more serious about it this season. In reading through the "2009 Solo Rules" classifications an '05 Elise with BWR SC will be in the SSM class.

Page 180 Says Turbo or Supercharged engines are classified on a basis of adding 1.4L to actual displacement.

Page 181 has the minimum Weight Calcs:
Minimum Weight Calculations:
All listed weights are without driver.
FWD: 1350lbs + 125 lbs/liter
RWD: 1600 lbs + 200 lbs/liter
AWD: 1600 lbs + 300 lbs/liter
Cars with engine located behind driver: +25 lbs/liter

My math says:
Engine capacity 1.8
Super Charger addition 1.4
Engine Capacity Basis 3.2


RWD WT Basis 1,600
225lb / liter * 3.2 Liters 720
Minimum Weight 2,320
Actual Weight 1,984
Ballast Required 336

Am I figuring that right? I think 336 lbs exceeds the max capacity of both the
trunk and passenger compartment once you add a driver.

- Todd

[tpearsall]

Found more on Page 180:
Weight Adjustments
Cars running tires with a rated width of 275 mm or less on all four
wheels may compete at a minimum weight 200 lbs less than their
calculated weight.

Engine capacity 1.8
Super Charger addition 1.4
Engine Capacity Basis 3.2

RWD WT Basis 1,600
225lb / liter * 3.2 Liters 720
Minimum Weight 2,320
Adjusted Min Wt 2,120 For tires < 275mm
Actual Weight 1,984
Ballast Required 136

136lbs seems more do-able. I'm a ways off from being competitive enough for this to matter, but want to make sure I'm understanding the classification.

- Todd

[Sean G]

Todd,

Yes, your calculations are correct. You could even save a pound by using the actual displacement of 1795cc. You'd need creative places for the ballast to use the weight distribution to your advantage when you plan on being competitive, but you could bold lead under the passenger seat in the meantime. Run a full tank of gas, use a heavy battery, keep a subwoofer in the car...

I think the car could be competitive in SSM with decent power, 255 or 275 at all corners, and the suspension/aero/bodywork allowances.

[Bobby Smith]

What SCCA class does the Elise SC run in?
How about an 06 Elise with aftermarket SC and no other mods?

[spaf]

Originally Posted by Bobby Smith

What SCCA class does the Elise SC run in?
How about an 06 Elise with aftermarket SC and no other mods?

All factory SC'd Elise/Exiges run in ASP (no weight rules in ASP). They're also legal in SSM subject to the weight rules which means that you'd have to add weight to make the min.

Non factory SC and you're in SSM.

[FIL]

Originally Posted by spaf

All factory SC'd Elise/Exiges run in ASP (no weight rules in ASP). They're also legal in SSM subject to the weight rules which means that you'd have to add weight to make the min.

Non factory SC and you're in SSM.

Or XP if you'd rather subtract weight rather than add weight.

[CosmosMpower]

I would rather go to XP than deal with the Strielnicks FD RX-7.